drivers/pcmcia/ds.c

   1 /*
   2  * ds.c -- 16-bit PCMCIA core support
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  * The initial developer of the original code is David A. Hinds
   9  * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
  10  * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
  11  *
  12  * (C) 1999             David A. Hinds
  13  * (C) 2003 - 2005      Dominik Brodowski
  14  */
  15
  16 #include <linux/config.h>
  17 #include <linux/kernel.h>
  18 #include <linux/module.h>
  19 #include <linux/init.h>
  20 #include <linux/errno.h>
  21 #include <linux/list.h>
  22 #include <linux/delay.h>
  23 #include <linux/workqueue.h>
  24 #include <linux/crc32.h>
  25 #include <linux/firmware.h>
  26
  27 #define IN_CARD_SERVICES
  28 #include <pcmcia/cs_types.h>
  29 #include <pcmcia/cs.h>
  30 #include <pcmcia/cistpl.h>
  31 #include <pcmcia/ds.h>
  32 #include <pcmcia/ss.h>
  33
  34 #include "cs_internal.h"
  35 #include "ds_internal.h"
  36
  37 /*====================================================================*/
  38
  39 /* Module parameters */
  40
  41 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
  42 MODULE_DESCRIPTION("PCMCIA Driver Services");
  43 MODULE_LICENSE("GPL");
  44
  45 #ifdef DEBUG
  46 int ds_pc_debug;
  47
  48 module_param_named(pc_debug, ds_pc_debug, int, 0644);
  49
  50 #define ds_dbg(lvl, fmt, arg...) do {                           \
  51         if (ds_pc_debug > (lvl))                                        \
  52                 printk(KERN_DEBUG "ds: " fmt , ## arg);         \
  53 } while (0)
  54 #else
  55 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
  56 #endif
  57
  58 spinlock_t pcmcia_dev_list_lock;
  59
  60 static int unbind_request(struct pcmcia_socket *s);
  61
  62 /*====================================================================*/
  63
  64 /* code which was in cs.c before */
  65
  66 /* String tables for error messages */
  67
  68 typedef struct lookup_t {
  69     int key;
  70     char *msg;
  71 } lookup_t;
  72
  73 static const lookup_t error_table[] = {
  74     { CS_SUCCESS,               "Operation succeeded" },
  75     { CS_BAD_ADAPTER,           "Bad adapter" },
  76     { CS_BAD_ATTRIBUTE,         "Bad attribute", },
  77     { CS_BAD_BASE,              "Bad base address" },
  78     { CS_BAD_EDC,               "Bad EDC" },
  79     { CS_BAD_IRQ,               "Bad IRQ" },
  80     { CS_BAD_OFFSET,            "Bad offset" },
  81     { CS_BAD_PAGE,              "Bad page number" },
  82     { CS_READ_FAILURE,          "Read failure" },
  83     { CS_BAD_SIZE,              "Bad size" },
  84     { CS_BAD_SOCKET,            "Bad socket" },
  85     { CS_BAD_TYPE,              "Bad type" },
  86     { CS_BAD_VCC,               "Bad Vcc" },
  87     { CS_BAD_VPP,               "Bad Vpp" },
  88     { CS_BAD_WINDOW,            "Bad window" },
  89     { CS_WRITE_FAILURE,         "Write failure" },
  90     { CS_NO_CARD,               "No card present" },
  91     { CS_UNSUPPORTED_FUNCTION,  "Usupported function" },
  92     { CS_UNSUPPORTED_MODE,      "Unsupported mode" },
  93     { CS_BAD_SPEED,             "Bad speed" },
  94     { CS_BUSY,                  "Resource busy" },
  95     { CS_GENERAL_FAILURE,       "General failure" },
  96     { CS_WRITE_PROTECTED,       "Write protected" },
  97     { CS_BAD_ARG_LENGTH,        "Bad argument length" },
  98     { CS_BAD_ARGS,              "Bad arguments" },
  99     { CS_CONFIGURATION_LOCKED,  "Configuration locked" },
 100     { CS_IN_USE,                "Resource in use" },
 101     { CS_NO_MORE_ITEMS,         "No more items" },
 102     { CS_OUT_OF_RESOURCE,       "Out of resource" },
 103     { CS_BAD_HANDLE,            "Bad handle" },
 104     { CS_BAD_TUPLE,             "Bad CIS tuple" }
 105 };
 106
 107
 108 static const lookup_t service_table[] = {
 109     { AccessConfigurationRegister,      "AccessConfigurationRegister" },
 110     { AddSocketServices,                "AddSocketServices" },
 111     { AdjustResourceInfo,               "AdjustResourceInfo" },
 112     { CheckEraseQueue,                  "CheckEraseQueue" },
 113     { CloseMemory,                      "CloseMemory" },
 114     { DeregisterClient,                 "DeregisterClient" },
 115     { DeregisterEraseQueue,             "DeregisterEraseQueue" },
 116     { GetCardServicesInfo,              "GetCardServicesInfo" },
 117     { GetClientInfo,                    "GetClientInfo" },
 118     { GetConfigurationInfo,             "GetConfigurationInfo" },
 119     { GetEventMask,                     "GetEventMask" },
 120     { GetFirstClient,                   "GetFirstClient" },
 121     { GetFirstRegion,                   "GetFirstRegion" },
 122     { GetFirstTuple,                    "GetFirstTuple" },
 123     { GetNextClient,                    "GetNextClient" },
 124     { GetNextRegion,                    "GetNextRegion" },
 125     { GetNextTuple,                     "GetNextTuple" },
 126     { GetStatus,                        "GetStatus" },
 127     { GetTupleData,                     "GetTupleData" },
 128     { MapMemPage,                       "MapMemPage" },
 129     { ModifyConfiguration,              "ModifyConfiguration" },
 130     { ModifyWindow,                     "ModifyWindow" },
 131     { OpenMemory,                       "OpenMemory" },
 132     { ParseTuple,                       "ParseTuple" },
 133     { ReadMemory,                       "ReadMemory" },
 134     { RegisterClient,                   "RegisterClient" },
 135     { RegisterEraseQueue,               "RegisterEraseQueue" },
 136     { RegisterMTD,                      "RegisterMTD" },
 137     { ReleaseConfiguration,             "ReleaseConfiguration" },
 138     { ReleaseIO,                        "ReleaseIO" },
 139     { ReleaseIRQ,                       "ReleaseIRQ" },
 140     { ReleaseWindow,                    "ReleaseWindow" },
 141     { RequestConfiguration,             "RequestConfiguration" },
 142     { RequestIO,                        "RequestIO" },
 143     { RequestIRQ,                       "RequestIRQ" },
 144     { RequestSocketMask,                "RequestSocketMask" },
 145     { RequestWindow,                    "RequestWindow" },
 146     { ResetCard,                        "ResetCard" },
 147     { SetEventMask,                     "SetEventMask" },
 148     { ValidateCIS,                      "ValidateCIS" },
 149     { WriteMemory,                      "WriteMemory" },
 150     { BindDevice,                       "BindDevice" },
 151     { BindMTD,                          "BindMTD" },
 152     { ReportError,                      "ReportError" },
 153     { SuspendCard,                      "SuspendCard" },
 154     { ResumeCard,                       "ResumeCard" },
 155     { EjectCard,                        "EjectCard" },
 156     { InsertCard,                       "InsertCard" },
 157     { ReplaceCIS,                       "ReplaceCIS" }
 158 };
 159
 160
 161 static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err)
 162 {
 163         int i;
 164         char *serv;
 165
 166         if (!p_dev)
 167                 printk(KERN_NOTICE);
 168         else
 169                 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
 170
 171         for (i = 0; i < ARRAY_SIZE(service_table); i++)
 172                 if (service_table[i].key == err->func)
 173                         break;
 174         if (i < ARRAY_SIZE(service_table))
 175                 serv = service_table[i].msg;
 176         else
 177                 serv = "Unknown service number";
 178
 179         for (i = 0; i < ARRAY_SIZE(error_table); i++)
 180                 if (error_table[i].key == err->retcode)
 181                         break;
 182         if (i < ARRAY_SIZE(error_table))
 183                 printk("%s: %s\n", serv, error_table[i].msg);
 184         else
 185                 printk("%s: Unknown error code %#x\n", serv, err->retcode);
 186
 187         return CS_SUCCESS;
 188 } /* report_error */
 189
 190 /* end of code which was in cs.c before */
 191
 192 /*======================================================================*/
 193
 194 void cs_error(struct pcmcia_device *p_dev, int func, int ret)
 195 {
 196         error_info_t err = { func, ret };
 197         pcmcia_report_error(p_dev, &err);
 198 }
 199 EXPORT_SYMBOL(cs_error);
 200
 201
 202 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
 203 {
 204         struct pcmcia_device_id *did = p_drv->id_table;
 205         unsigned int i;
 206         u32 hash;
 207
 208         if (!p_drv->attach || !p_drv->event || !p_drv->detach)
 209                 printk(KERN_DEBUG "pcmcia: %s does misses a callback function",
 210                        p_drv->drv.name);
 211
 212         while (did && did->match_flags) {
 213                 for (i=0; i<4; i++) {
 214                         if (!did->prod_id[i])
 215                                 continue;
 216
 217                         hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
 218                         if (hash == did->prod_id_hash[i])
 219                                 continue;
 220
 221                         printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
 222                                "product string \"%s\": is 0x%x, should "
 223                                "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
 224                                did->prod_id_hash[i], hash);
 225                         printk(KERN_DEBUG "pcmcia: see "
 226                                 "Documentation/pcmcia/devicetable.txt for "
 227                                 "details\n");
 228                 }
 229                 did++;
 230         }
 231
 232         return;
 233 }
 234
 235
 236 #ifdef CONFIG_PCMCIA_LOAD_CIS
 237
 238 /**
 239  * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
 240  * @dev - the pcmcia device which needs a CIS override
 241  * @filename - requested filename in /lib/firmware/cis/
 242  *
 243  * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
 244  * the one provided by the card is broken. The firmware files reside in
 245  * /lib/firmware/cis/ in userspace.
 246  */
 247 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 248 {
 249         struct pcmcia_socket *s = dev->socket;
 250         const struct firmware *fw;
 251         char path[20];
 252         int ret=-ENOMEM;
 253         cisdump_t *cis;
 254
 255         if (!filename)
 256                 return -EINVAL;
 257
 258         ds_dbg(1, "trying to load firmware %s\n", filename);
 259
 260         if (strlen(filename) > 14)
 261                 return -EINVAL;
 262
 263         snprintf(path, 20, "%s", filename);
 264
 265         if (request_firmware(&fw, path, &dev->dev) == 0) {
 266                 if (fw->size >= CISTPL_MAX_CIS_SIZE)
 267                         goto release;
 268
 269                 cis = kmalloc(sizeof(cisdump_t), GFP_KERNEL);
 270                 if (!cis)
 271                         goto release;
 272
 273                 memset(cis, 0, sizeof(cisdump_t));
 274
 275                 cis->Length = fw->size + 1;
 276                 memcpy(cis->Data, fw->data, fw->size);
 277
 278                 if (!pcmcia_replace_cis(s, cis))
 279                         ret = 0;
 280         }
 281  release:
 282         release_firmware(fw);
 283
 284         return (ret);
 285 }
 286
 287 #else /* !CONFIG_PCMCIA_LOAD_CIS */
 288
 289 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
 290 {
 291         return -ENODEV;
 292 }
 293
 294 #endif
 295
 296
 297 /*======================================================================*/
 298
 299
 300 /**
 301  * pcmcia_register_driver - register a PCMCIA driver with the bus core
 302  *
 303  * Registers a PCMCIA driver with the PCMCIA bus core.
 304  */
 305 static int pcmcia_device_probe(struct device *dev);
 306 static int pcmcia_device_remove(struct device * dev);
 307
 308 int pcmcia_register_driver(struct pcmcia_driver *driver)
 309 {
 310         if (!driver)
 311                 return -EINVAL;
 312
 313         pcmcia_check_driver(driver);
 314
 315         /* initialize common fields */
 316         driver->drv.bus = &pcmcia_bus_type;
 317         driver->drv.owner = driver->owner;
 318         driver->drv.probe = pcmcia_device_probe;
 319         driver->drv.remove = pcmcia_device_remove;
 320
 321         return driver_register(&driver->drv);
 322 }
 323 EXPORT_SYMBOL(pcmcia_register_driver);
 324
 325 /**
 326  * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
 327  */
 328 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
 329 {
 330         driver_unregister(&driver->drv);
 331 }
 332 EXPORT_SYMBOL(pcmcia_unregister_driver);
 333
 334
 335 /* pcmcia_device handling */
 336
 337 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
 338 {
 339         struct device *tmp_dev;
 340         tmp_dev = get_device(&p_dev->dev);
 341         if (!tmp_dev)
 342                 return NULL;
 343         return to_pcmcia_dev(tmp_dev);
 344 }
 345
 346 void pcmcia_put_dev(struct pcmcia_device *p_dev)
 347 {
 348         if (p_dev)
 349                 put_device(&p_dev->dev);
 350 }
 351
 352 static void pcmcia_release_dev(struct device *dev)
 353 {
 354         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 355         ds_dbg(1, "releasing dev %p\n", p_dev);
 356         pcmcia_put_socket(p_dev->socket);
 357         kfree(p_dev);
 358 }
 359
 360
 361 static int pcmcia_device_probe(struct device * dev)
 362 {
 363         struct pcmcia_device *p_dev;
 364         struct pcmcia_driver *p_drv;
 365         int ret = 0;
 366
 367         dev = get_device(dev);
 368         if (!dev)
 369                 return -ENODEV;
 370
 371         p_dev = to_pcmcia_dev(dev);
 372         p_drv = to_pcmcia_drv(dev->driver);
 373
 374         if (!try_module_get(p_drv->owner)) {
 375                 ret = -EINVAL;
 376                 goto put_dev;
 377         }
 378
 379         if (p_drv->attach) {
 380                 p_dev->instance = p_drv->attach();
 381                 if ((!p_dev->instance) || (p_dev->state & CLIENT_UNBOUND)) {
 382                         printk(KERN_NOTICE "ds: unable to create instance "
 383                                "of '%s'!\n", p_drv->drv.name);
 384                         ret = -EINVAL;
 385                 }
 386         }
 387
 388         if (ret)
 389                 module_put(p_drv->owner);
 390  put_dev:
 391         if ((ret) || !(p_drv->attach))
 392                 put_device(dev);
 393         return (ret);
 394 }
 395
 396
 397 static int pcmcia_device_remove(struct device * dev)
 398 {
 399         struct pcmcia_device *p_dev;
 400         struct pcmcia_driver *p_drv;
 401
 402         /* detach the "instance" */
 403         p_dev = to_pcmcia_dev(dev);
 404         p_drv = to_pcmcia_drv(dev->driver);
 405
 406         if (p_drv) {
 407                 if ((p_drv->detach) && (p_dev->instance)) {
 408                         p_drv->detach(p_dev->instance);
 409                         /* from pcmcia_probe_device */
 410                         put_device(&p_dev->dev);
 411                 }
 412                 module_put(p_drv->owner);
 413         }
 414
 415         return 0;
 416 }
 417
 418
 419
 420 /*
 421  * pcmcia_device_query -- determine information about a pcmcia device
 422  */
 423 static int pcmcia_device_query(struct pcmcia_device *p_dev)
 424 {
 425         cistpl_manfid_t manf_id;
 426         cistpl_funcid_t func_id;
 427         cistpl_vers_1_t vers1;
 428         unsigned int i;
 429
 430         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 431                                CISTPL_MANFID, &manf_id)) {
 432                 p_dev->manf_id = manf_id.manf;
 433                 p_dev->card_id = manf_id.card;
 434                 p_dev->has_manf_id = 1;
 435                 p_dev->has_card_id = 1;
 436         }
 437
 438         if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 439                                CISTPL_FUNCID, &func_id)) {
 440                 p_dev->func_id = func_id.func;
 441                 p_dev->has_func_id = 1;
 442         } else {
 443                 /* rule of thumb: cards with no FUNCID, but with
 444                  * common memory device geometry information, are
 445                  * probably memory cards (from pcmcia-cs) */
 446                 cistpl_device_geo_t devgeo;
 447                 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
 448                                       CISTPL_DEVICE_GEO, &devgeo)) {
 449                         ds_dbg(0, "mem device geometry probably means "
 450                                "FUNCID_MEMORY\n");
 451                         p_dev->func_id = CISTPL_FUNCID_MEMORY;
 452                         p_dev->has_func_id = 1;
 453                 }
 454         }
 455
 456         if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
 457                                &vers1)) {
 458                 for (i=0; i < vers1.ns; i++) {
 459                         char *tmp;
 460                         unsigned int length;
 461
 462                         tmp = vers1.str + vers1.ofs[i];
 463
 464                         length = strlen(tmp) + 1;
 465                         if ((length < 3) || (length > 255))
 466                                 continue;
 467
 468                         p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
 469                                                     GFP_KERNEL);
 470                         if (!p_dev->prod_id[i])
 471                                 continue;
 472
 473                         p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
 474                                                     tmp, length);
 475                 }
 476         }
 477
 478         return 0;
 479 }
 480
 481
 482 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
 483  * Serializes pcmcia_device_add; will most likely be removed in future.
 484  *
 485  * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
 486  * won't work, this doesn't matter much at the moment: the driver core doesn't
 487  * support it either.
 488  */
 489 static DECLARE_MUTEX(device_add_lock);
 490
 491 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
 492 {
 493         struct pcmcia_device *p_dev;
 494         unsigned long flags;
 495
 496         s = pcmcia_get_socket(s);
 497         if (!s)
 498                 return NULL;
 499
 500         down(&device_add_lock);
 501
 502         /* max of 2 devices per card */
 503         if (s->device_count == 2)
 504                 goto err_put;
 505
 506         p_dev = kmalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
 507         if (!p_dev)
 508                 goto err_put;
 509         memset(p_dev, 0, sizeof(struct pcmcia_device));
 510
 511         p_dev->socket = s;
 512         p_dev->device_no = (s->device_count++);
 513         p_dev->func   = function;
 514
 515         p_dev->dev.bus = &pcmcia_bus_type;
 516         p_dev->dev.parent = s->dev.dev;
 517         p_dev->dev.release = pcmcia_release_dev;
 518         sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
 519
 520         /* compat */
 521         p_dev->state = CLIENT_UNBOUND;
 522
 523         /* Add to the list in pcmcia_bus_socket */
 524         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 525         list_add_tail(&p_dev->socket_device_list, &s->devices_list);
 526         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 527
 528         pcmcia_device_query(p_dev);
 529
 530         if (device_register(&p_dev->dev)) {
 531                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 532                 list_del(&p_dev->socket_device_list);
 533                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 534
 535                 goto err_free;
 536        }
 537
 538         up(&device_add_lock);
 539
 540         return p_dev;
 541
 542  err_free:
 543         kfree(p_dev);
 544         s->device_count--;
 545  err_put:
 546         up(&device_add_lock);
 547         pcmcia_put_socket(s);
 548
 549         return NULL;
 550 }
 551
 552
 553 static int pcmcia_card_add(struct pcmcia_socket *s)
 554 {
 555         cisinfo_t cisinfo;
 556         cistpl_longlink_mfc_t mfc;
 557         unsigned int no_funcs, i;
 558         int ret = 0;
 559
 560         if (!(s->resource_setup_done))
 561                 return -EAGAIN; /* try again, but later... */
 562
 563         pcmcia_validate_mem(s);
 564         ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
 565         if (ret || !cisinfo.Chains) {
 566                 ds_dbg(0, "invalid CIS or invalid resources\n");
 567                 return -ENODEV;
 568         }
 569
 570         if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
 571                 no_funcs = mfc.nfn;
 572         else
 573                 no_funcs = 1;
 574
 575         for (i=0; i < no_funcs; i++)
 576                 pcmcia_device_add(s, i);
 577
 578         return (ret);
 579 }
 580
 581
 582 static void pcmcia_delayed_add_pseudo_device(void *data)
 583 {
 584         struct pcmcia_socket *s = data;
 585         pcmcia_device_add(s, 0);
 586         s->pcmcia_state.device_add_pending = 0;
 587 }
 588
 589 static inline void pcmcia_add_pseudo_device(struct pcmcia_socket *s)
 590 {
 591         if (!s->pcmcia_state.device_add_pending) {
 592                 schedule_work(&s->device_add);
 593                 s->pcmcia_state.device_add_pending = 1;
 594         }
 595         return;
 596 }
 597
 598 static int pcmcia_requery(struct device *dev, void * _data)
 599 {
 600         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 601         if (!p_dev->dev.driver)
 602                 pcmcia_device_query(p_dev);
 603
 604         return 0;
 605 }
 606
 607 static void pcmcia_bus_rescan(struct pcmcia_socket *skt)
 608 {
 609         int no_devices=0;
 610         unsigned long flags;
 611
 612         /* must be called with skt_sem held */
 613         spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
 614         if (list_empty(&skt->devices_list))
 615                 no_devices=1;
 616         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
 617
 618         /* if no devices were added for this socket yet because of
 619          * missing resource information or other trouble, we need to
 620          * do this now. */
 621         if (no_devices) {
 622                 int ret = pcmcia_card_add(skt);
 623                 if (ret)
 624                         return;
 625         }
 626
 627         /* some device information might have changed because of a CIS
 628          * update or because we can finally read it correctly... so
 629          * determine it again, overwriting old values if necessary. */
 630         bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
 631
 632         /* we re-scan all devices, not just the ones connected to this
 633          * socket. This does not matter, though. */
 634         bus_rescan_devices(&pcmcia_bus_type);
 635 }
 636
 637 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
 638                                   struct pcmcia_device_id *did)
 639 {
 640         if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
 641                 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
 642                         return 0;
 643         }
 644
 645         if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
 646                 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
 647                         return 0;
 648         }
 649
 650         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
 651                 if (dev->func != did->function)
 652                         return 0;
 653         }
 654
 655         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
 656                 if (!dev->prod_id[0])
 657                         return 0;
 658                 if (strcmp(did->prod_id[0], dev->prod_id[0]))
 659                         return 0;
 660         }
 661
 662         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
 663                 if (!dev->prod_id[1])
 664                         return 0;
 665                 if (strcmp(did->prod_id[1], dev->prod_id[1]))
 666                         return 0;
 667         }
 668
 669         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
 670                 if (!dev->prod_id[2])
 671                         return 0;
 672                 if (strcmp(did->prod_id[2], dev->prod_id[2]))
 673                         return 0;
 674         }
 675
 676         if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
 677                 if (!dev->prod_id[3])
 678                         return 0;
 679                 if (strcmp(did->prod_id[3], dev->prod_id[3]))
 680                         return 0;
 681         }
 682
 683         if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
 684                 /* handle pseudo multifunction devices:
 685                  * there are at most two pseudo multifunction devices.
 686                  * if we're matching against the first, schedule a
 687                  * call which will then check whether there are two
 688                  * pseudo devices, and if not, add the second one.
 689                  */
 690                 if (dev->device_no == 0)
 691                         pcmcia_add_pseudo_device(dev->socket);
 692
 693                 if (dev->device_no != did->device_no)
 694                         return 0;
 695         }
 696
 697         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
 698                 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
 699                         return 0;
 700
 701                 /* if this is a pseudo-multi-function device,
 702                  * we need explicit matches */
 703                 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
 704                         return 0;
 705                 if (dev->device_no)
 706                         return 0;
 707
 708                 /* also, FUNC_ID matching needs to be activated by userspace
 709                  * after it has re-checked that there is no possible module
 710                  * with a prod_id/manf_id/card_id match.
 711                  */
 712                 if (!dev->allow_func_id_match)
 713                         return 0;
 714         }
 715
 716         if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
 717                 if (!dev->socket->fake_cis)
 718                         pcmcia_load_firmware(dev, did->cisfile);
 719
 720                 if (!dev->socket->fake_cis)
 721                         return 0;
 722         }
 723
 724         if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
 725                 int i;
 726                 for (i=0; i<4; i++)
 727                         if (dev->prod_id[i])
 728                                 return 0;
 729                 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
 730                         return 0;
 731         }
 732
 733         dev->dev.driver_data = (void *) did;
 734
 735         return 1;
 736 }
 737
 738
 739 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
 740         struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
 741         struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
 742         struct pcmcia_device_id *did = p_drv->id_table;
 743
 744         /* matching by cardmgr */
 745         if (p_dev->cardmgr == p_drv)
 746                 return 1;
 747
 748         while (did && did->match_flags) {
 749                 if (pcmcia_devmatch(p_dev, did))
 750                         return 1;
 751                 did++;
 752         }
 753
 754         return 0;
 755 }
 756
 757 #ifdef CONFIG_HOTPLUG
 758
 759 static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp,
 760                               char *buffer, int buffer_size)
 761 {
 762         struct pcmcia_device *p_dev;
 763         int i, length = 0;
 764         u32 hash[4] = { 0, 0, 0, 0};
 765
 766         if (!dev)
 767                 return -ENODEV;
 768
 769         p_dev = to_pcmcia_dev(dev);
 770
 771         /* calculate hashes */
 772         for (i=0; i<4; i++) {
 773                 if (!p_dev->prod_id[i])
 774                         continue;
 775                 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
 776         }
 777
 778         i = 0;
 779
 780         if (add_hotplug_env_var(envp, num_envp, &i,
 781                                 buffer, buffer_size, &length,
 782                                 "SOCKET_NO=%u",
 783                                 p_dev->socket->sock))
 784                 return -ENOMEM;
 785
 786         if (add_hotplug_env_var(envp, num_envp, &i,
 787                                 buffer, buffer_size, &length,
 788                                 "DEVICE_NO=%02X",
 789                                 p_dev->device_no))
 790                 return -ENOMEM;
 791
 792         if (add_hotplug_env_var(envp, num_envp, &i,
 793                                 buffer, buffer_size, &length,
 794                                 "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 795                                 "pa%08Xpb%08Xpc%08Xpd%08X",
 796                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
 797                                 p_dev->has_card_id ? p_dev->card_id : 0,
 798                                 p_dev->has_func_id ? p_dev->func_id : 0,
 799                                 p_dev->func,
 800                                 p_dev->device_no,
 801                                 hash[0],
 802                                 hash[1],
 803                                 hash[2],
 804                                 hash[3]))
 805                 return -ENOMEM;
 806
 807         envp[i] = NULL;
 808
 809         return 0;
 810 }
 811
 812 #else
 813
 814 static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp,
 815                               char *buffer, int buffer_size)
 816 {
 817         return -ENODEV;
 818 }
 819
 820 #endif
 821
 822 /************************ per-device sysfs output ***************************/
 823
 824 #define pcmcia_device_attr(field, test, format)                         \
 825 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf)              \
 826 {                                                                       \
 827         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 828         return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
 829 }
 830
 831 #define pcmcia_device_stringattr(name, field)                                   \
 832 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf)               \
 833 {                                                                       \
 834         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);               \
 835         return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
 836 }
 837
 838 pcmcia_device_attr(func, socket, "0x%02x\n");
 839 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
 840 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
 841 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
 842 pcmcia_device_stringattr(prod_id1, prod_id[0]);
 843 pcmcia_device_stringattr(prod_id2, prod_id[1]);
 844 pcmcia_device_stringattr(prod_id3, prod_id[2]);
 845 pcmcia_device_stringattr(prod_id4, prod_id[3]);
 846
 847 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
 848 {
 849         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 850         int i;
 851         u32 hash[4] = { 0, 0, 0, 0};
 852
 853         /* calculate hashes */
 854         for (i=0; i<4; i++) {
 855                 if (!p_dev->prod_id[i])
 856                         continue;
 857                 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
 858         }
 859         return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
 860                                 "pa%08Xpb%08Xpc%08Xpd%08X\n",
 861                                 p_dev->has_manf_id ? p_dev->manf_id : 0,
 862                                 p_dev->has_card_id ? p_dev->card_id : 0,
 863                                 p_dev->has_func_id ? p_dev->func_id : 0,
 864                                 p_dev->func, p_dev->device_no,
 865                                 hash[0], hash[1], hash[2], hash[3]);
 866 }
 867
 868 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
 869                 struct device_attribute *attr, const char *buf, size_t count)
 870 {
 871         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 872         if (!count)
 873                 return -EINVAL;
 874
 875         down(&p_dev->socket->skt_sem);
 876         p_dev->allow_func_id_match = 1;
 877         up(&p_dev->socket->skt_sem);
 878
 879         bus_rescan_devices(&pcmcia_bus_type);
 880
 881         return count;
 882 }
 883
 884 static struct device_attribute pcmcia_dev_attrs[] = {
 885         __ATTR(function, 0444, func_show, NULL),
 886         __ATTR_RO(func_id),
 887         __ATTR_RO(manf_id),
 888         __ATTR_RO(card_id),
 889         __ATTR_RO(prod_id1),
 890         __ATTR_RO(prod_id2),
 891         __ATTR_RO(prod_id3),
 892         __ATTR_RO(prod_id4),
 893         __ATTR_RO(modalias),
 894         __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
 895         __ATTR_NULL,
 896 };
 897
 898
 899 /*======================================================================
 900
 901     The card status event handler.
 902
 903 ======================================================================*/
 904
 905 struct send_event_data {
 906         struct pcmcia_socket *skt;
 907         event_t event;
 908         int priority;
 909 };
 910
 911 static int send_event_callback(struct device *dev, void * _data)
 912 {
 913         struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
 914         struct pcmcia_driver *p_drv;
 915         struct send_event_data *data = _data;
 916
 917         /* we get called for all sockets, but may only pass the event
 918          * for drivers _on the affected socket_ */
 919         if (p_dev->socket != data->skt)
 920                 return 0;
 921
 922         p_drv = to_pcmcia_drv(p_dev->dev.driver);
 923         if (!p_drv)
 924                 return 0;
 925
 926         if (p_dev->state & (CLIENT_UNBOUND|CLIENT_STALE))
 927                 return 0;
 928
 929         if (p_drv->event)
 930                 return p_drv->event(data->event, data->priority,
 931                                     &p_dev->event_callback_args);
 932
 933         return 0;
 934 }
 935
 936 static int send_event(struct pcmcia_socket *s, event_t event, int priority)
 937 {
 938         struct send_event_data private;
 939
 940         private.skt = s;
 941         private.event = event;
 942         private.priority = priority;
 943
 944         return bus_for_each_dev(&pcmcia_bus_type, NULL, &private, send_event_callback);
 945 } /* send_event */
 946
 947
 948 /* Normally, the event is passed to individual drivers after
 949  * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
 950  * is inversed to maintain historic compatibility.
 951  */
 952
 953 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
 954 {
 955         struct pcmcia_socket *s = pcmcia_get_socket(skt);
 956         int ret = 0;
 957
 958         ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
 959                event, priority, skt);
 960
 961         switch (event) {
 962
 963         case CS_EVENT_CARD_REMOVAL:
 964                 s->pcmcia_state.present = 0;
 965                 send_event(skt, event, priority);
 966                 unbind_request(skt);
 967                 handle_event(skt, event);
 968                 break;
 969
 970         case CS_EVENT_CARD_INSERTION:
 971                 s->pcmcia_state.present = 1;
 972                 pcmcia_card_add(skt);
 973                 handle_event(skt, event);
 974                 break;
 975
 976         case CS_EVENT_EJECTION_REQUEST:
 977                 ret = send_event(skt, event, priority);
 978                 break;
 979
 980         default:
 981                 handle_event(skt, event);
 982                 send_event(skt, event, priority);
 983                 break;
 984     }
 985
 986     pcmcia_put_socket(s);
 987
 988     return 0;
 989 } /* ds_event */
 990
 991
 992
 993 int pcmcia_register_client(struct pcmcia_device **handle, client_reg_t *req)
 994 {
 995         struct pcmcia_socket *s = NULL;
 996         struct pcmcia_device *p_dev = NULL;
 997         struct pcmcia_driver *p_drv = NULL;
 998
 999         /* Look for unbound client with matching dev_info */
1000         down_read(&pcmcia_socket_list_rwsem);
1001         list_for_each_entry(s, &pcmcia_socket_list, socket_list) {
1002                 unsigned long flags;
1003
1004                 if (s->state & SOCKET_CARDBUS)
1005                         continue;
1006
1007                 s = pcmcia_get_socket(s);
1008                 if (!s)
1009                         continue;
1010                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
1011                 list_for_each_entry(p_dev, &s->devices_list, socket_device_list) {
1012                         p_dev = pcmcia_get_dev(p_dev);
1013                         if (!p_dev)
1014                                 continue;
1015                         if (!(p_dev->state & CLIENT_UNBOUND) ||
1016                             (!p_dev->dev.driver)) {
1017                                 pcmcia_put_dev(p_dev);
1018                                 continue;
1019                         }
1020                         p_drv = to_pcmcia_drv(p_dev->dev.driver);
1021                         if (!strncmp(p_drv->drv.name, (char *)req->dev_info, DEV_NAME_LEN)) {
1022                                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1023                                 goto found;
1024                         }
1025                         pcmcia_put_dev(p_dev);
1026                 }
1027                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1028                 pcmcia_put_socket(s);
1029         }
1030  found:
1031         up_read(&pcmcia_socket_list_rwsem);
1032         if (!p_dev)
1033                 return -ENODEV;
1034
1035         pcmcia_put_socket(s); /* safe, as we already hold a reference from bind_device */
1036
1037         *handle = p_dev;
1038         p_dev->state &= ~CLIENT_UNBOUND;
1039         p_dev->event_callback_args = req->event_callback_args;
1040         p_dev->event_callback_args.client_handle = p_dev;
1041
1042
1043         if (!s->functions) {
1044                 cistpl_longlink_mfc_t mfc;
1045                 if (pccard_read_tuple(s, p_dev->func, CISTPL_LONGLINK_MFC, &mfc)
1046                     == CS_SUCCESS)
1047                         s->functions = mfc.nfn;
1048                 else
1049                         s->functions = 1;
1050                 s->config = kmalloc(sizeof(config_t) * s->functions,
1051                                     GFP_KERNEL);
1052                 if (!s->config)
1053                         goto out_no_resource;
1054                 memset(s->config, 0, sizeof(config_t) * s->functions);
1055         }
1056
1057         ds_dbg(1, "register_client(): client 0x%p, dev %s\n",
1058                p_dev, p_dev->dev.bus_id);
1059
1060         if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) {
1061                 if (p_drv->event)
1062                         p_drv->event(CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW,
1063                                      &p_dev->event_callback_args);
1064
1065         }
1066
1067         return CS_SUCCESS;
1068
1069  out_no_resource:
1070         pcmcia_put_dev(p_dev);
1071         return CS_OUT_OF_RESOURCE;
1072 } /* register_client */
1073 EXPORT_SYMBOL(pcmcia_register_client);
1074
1075
1076 /* unbind _all_ devices attached to a given pcmcia_bus_socket. The
1077  * drivers have been called with EVENT_CARD_REMOVAL before.
1078  */
1079 static int unbind_request(struct pcmcia_socket *s)
1080 {
1081         struct pcmcia_device    *p_dev;
1082         unsigned long           flags;
1083
1084         ds_dbg(2, "unbind_request(%d)\n", s->sock);
1085
1086         s->device_count = 0;
1087
1088         for (;;) {
1089                 /* unregister all pcmcia_devices registered with this socket*/
1090                 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
1091                 if (list_empty(&s->devices_list)) {
1092                         spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1093                         return 0;
1094                 }
1095                 p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list);
1096                 list_del(&p_dev->socket_device_list);
1097                 p_dev->state |= CLIENT_STALE;
1098                 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
1099
1100                 device_unregister(&p_dev->dev);
1101         }
1102
1103         return 0;
1104 } /* unbind_request */
1105
1106 int pcmcia_deregister_client(struct pcmcia_device *p_dev)
1107 {
1108         struct pcmcia_socket *s;
1109         int i;
1110
1111         s = p_dev->socket;
1112         ds_dbg(1, "deregister_client(%p)\n", p_dev);
1113
1114         if (p_dev->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED))
1115                 goto warn_out;
1116         for (i = 0; i < MAX_WIN; i++)
1117                 if (p_dev->state & CLIENT_WIN_REQ(i))
1118                         goto warn_out;
1119
1120         if (p_dev->state & CLIENT_STALE) {
1121                 p_dev->state &= ~CLIENT_STALE;
1122                 pcmcia_put_dev(p_dev);
1123         } else {
1124                 p_dev->state = CLIENT_UNBOUND;
1125         }
1126
1127         return CS_SUCCESS;
1128  warn_out:
1129         printk(KERN_WARNING "ds: deregister_client was called too early.\n");
1130         return CS_IN_USE;
1131 } /* deregister_client */
1132 EXPORT_SYMBOL(pcmcia_deregister_client);
1133
1134 static struct pcmcia_callback pcmcia_bus_callback = {
1135         .owner = THIS_MODULE,
1136         .event = ds_event,
1137         .requery = pcmcia_bus_rescan,
1138 };
1139
1140 static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev)
1141 {
1142         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1143         int ret;
1144
1145         socket = pcmcia_get_socket(socket);
1146         if (!socket) {
1147                 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1148                 return -ENODEV;
1149         }
1150
1151         /*
1152          * Ugly. But we want to wait for the socket threads to have started up.
1153          * We really should let the drivers themselves drive some of this..
1154          */
1155         msleep(250);
1156
1157 #ifdef CONFIG_PCMCIA_IOCTL
1158         init_waitqueue_head(&socket->queue);
1159 #endif
1160         INIT_LIST_HEAD(&socket->devices_list);
1161         INIT_WORK(&socket->device_add, pcmcia_delayed_add_pseudo_device, socket);
1162         memset(&socket->pcmcia_state, 0, sizeof(u8));
1163         socket->device_count = 0;
1164
1165         ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1166         if (ret) {
1167                 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1168                 pcmcia_put_socket(socket);
1169                 return (ret);
1170         }
1171
1172         return 0;
1173 }
1174
1175 static void pcmcia_bus_remove_socket(struct class_device *class_dev)
1176 {
1177         struct pcmcia_socket *socket = class_get_devdata(class_dev);
1178
1179         if (!socket)
1180                 return;
1181
1182         socket->pcmcia_state.dead = 1;
1183         pccard_register_pcmcia(socket, NULL);
1184
1185         pcmcia_put_socket(socket);
1186
1187         return;
1188 }
1189
1190
1191 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1192 static struct class_interface pcmcia_bus_interface = {
1193         .class = &pcmcia_socket_class,
1194         .add = &pcmcia_bus_add_socket,
1195         .remove = &pcmcia_bus_remove_socket,
1196 };
1197
1198
1199 struct bus_type pcmcia_bus_type = {
1200         .name = "pcmcia",
1201         .hotplug = pcmcia_bus_hotplug,
1202         .match = pcmcia_bus_match,
1203         .dev_attrs = pcmcia_dev_attrs,
1204 };
1205
1206
1207 static int __init init_pcmcia_bus(void)
1208 {
1209         spin_lock_init(&pcmcia_dev_list_lock);
1210
1211         bus_register(&pcmcia_bus_type);
1212         class_interface_register(&pcmcia_bus_interface);
1213
1214         pcmcia_setup_ioctl();
1215
1216         return 0;
1217 }
1218 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1219                                * pcmcia_socket_class is already registered */
1220
1221
1222 static void __exit exit_pcmcia_bus(void)
1223 {
1224         pcmcia_cleanup_ioctl();
1225
1226         class_interface_unregister(&pcmcia_bus_interface);
1227
1228         bus_unregister(&pcmcia_bus_type);
1229 }
1230 module_exit(exit_pcmcia_bus);
1231
1232
1233 MODULE_ALIAS("ds");